Sometimes we perceive life as a set of backsteps, for which we feel really sorry. Here's an alternative view: you can see it as dancing your way through life, instead of treading it. One step forward, two steps back at times or perhaps three steps forward, one step back; this is life and flow. Every human being dances through and with them; we don't just walk them.
Happiness is about you being part of the vast space. It is about being joyful and at peace with this fact. It is about not wanting to be anything else than this simple, humble, yet glorious, part of life in the making.